Lubricator.



- E. MCCOY.

LUBRICATOR.

APPLICATION FILED JAN. 15, 191s.

Patented July 25, 1916.

UNITED STATES PATENT OFFICE- ELIJ AH MCCOY, OF DETROIT, MICHIGAN, ASSIGNOR OF FIFTY-TWO ONE-HUNDREDTHS TO FRANCIS H. WARREN, OF DETROIT, MICHIGAN.

LUBRICATOR.

Specification of Letters Patent.

Patented July 25, 1916.

Application filed January 15, 1916. Serial No. 72,213.

To all whom it may concern Be it known that LELHAH MoCoY, residing at Detroit, in the, county of Wayne and State of Michigan, have invented certain new and useful Improvements in Lubricators, of which the following is a specification, reference being had therein to the accompanying drawings.

Theinvention relates to lubricators and is more particularly designed for use upon 10- comotives or in other places which are subjected to pulsating back pressure.

It is the object of the invention to provide a supplemental lubricator for the feeding of graphite or similar lubricant which will not interfere with or choke the feeding of oil from the main lubricator and which also guards against siphoning action. To this end the invention comprises the construction as hereinafter set forth.

In the drawings: Figure 1 is a longitudinal section through the lubricator; and Fig. 2 is a horizontal section on line m.r Fig. 1.

A is the tallow pipe leading from the main lubricator, and B is a fitting for connecting said tallow pipe to the steam chest of the locomotive. and which contains the restricted passage or choke-plug C. This choke-plug as shown has a threaded engagement with a nipple D at the upper end of the fitting B, and a ,downwardly-projecting tubular portion E which is spaced from a surrounding cylindrical wall F. The point of greatest restriction in this choke-plug is preferably at the upper end thereof, as indicated at G, while the depending tubular portion E is preferably of greater internal diameter. The lower portion of this projection E is also externally cylindrical and concentric with the surrounding cylindrical walls F.

H is a valve within the annular chamber formed by the cylindrical wall F and having a slidable engagement therewith and with the central tube E. This valve is adapted to engage a seat I in the fitting B which is arranged below a laterally-extending port J. The port J communicates with a lubricant cup K surrounding the tubular wall F and provided with a removable plug L or other means for filling the same with lubricant.

M is a valve for closing the port J when the cup K is to be filled, said valve having a needle point N for forcibly dislodging any material which might clog the port. O is an external operating handle for said valve.

P is a restricted passage passing through the valve H and permitting the pressure below said valve to slowly equalize with the pressure above the same.

In operation the pressure within the steam chest below the valve H will pass upward through the restricted passage P to above the valve so as to equalize the static pressure on opposite sides. hen, however, the pulsating back pressure occurs the preponderance of pressure on the lower side of the valve will lift the same from its seat. This will uncover the port J and permit steam under pressure to be forced into the lubricant cup K, where it will pass through the lubricant and upon the cessation or diminution of the pulsation will displace a portion of the lubricant, forcing it downward through the port J. This action occurs while the valve Hcis held away from its seat, but as the back-pressure pulsation diminishes the pressure above the valve H will eventually become greater than that below the same, thereby forcing it to its seat. Thus under normal operation there will be successive displacements of lubricant, which will be the equivalent of a constant feed. The lubricant thus fed into the steam chest does not come into the direct path of the oil lubricant and will not clog the choke-plug C. On the other hand, when suction is developed in the steam chest, as where the engine is running without steam, there is no tendency to siphon the lubricant from the cup K, as the valve H will be drawn to its seat which effectually closes the port J. My construction is therefore adapted to 0p erate satisfactorily under all conditions.

What I claim as my invention is 2- 1. In a lubricator, the combination with a lubricant cup having a central tubular wall forming a portion of a lubricant conduit, of a choke-plug in said conduit having a portion extending concentrically within said tubular wall, an annular valve between said concentric tubes controlling a passage from said lubricant cup, a seat for said valve below said passage, and means permitting the restricted passage of fluid from one side of said valve to the other.

2. In a lubricator, the combination with a cup having a tubular central wall forming a portion of the tallow-pipe or conduit from an independent lubricator', said cup being provided with a port connecting with said I condult, a choke-plug 0r restrictlon in said conduit having a depending portion spaced from and concentric with said tubular wall, an annular valve surrounding said depend ing portion and slidably engaging said tubular wall, a seat for said valve below the passage from said lubricant cup, and means permitting the restricted passage of fluid from one side of said valve to the other.

3. In a lubricator, the combination with a casing forming a lubricant cup and having a central tubular wall constituting a portion of the tallow-pipe or conduit from an independent lubricator, said cup also communicating with said conduit, of a choke-plug within said conduit extending below the point of communication with said cup, and

an automatic valve for closing communication with said cup adapted to be unseated by back pressure.

4-. In a lubricator, the combination with a casing constituting a lubricant cup and having a central tubular wall therethrough forming a portion of the tallow-pipe or conduit from an independent lubricator, the lower end of said cup also communicating with said conduit, of a choke-plug in said conduit having a portion extending downward below the polnt of communication' with said cup, a valve ijor cutting ofi said communication slidable upon said depending portion of the choke-plug, and a seat for said valve.

5. In a lubricator, the combination with a casing constituting a lubricant cup and having a tubular wall therethrough forming a portion of a tallow-pipe or conduit from an independent lubricator, said cup also comond valve controlling said communication manually operable from outside of said casing.

6. A lubricator, comprising a casing having a central tubular portion and a surrounding annular wall constituting a lubricant cup, the lower, end of said cup communicating with the central tube, a chokeslug within said central tube having a depen ing portion spaced from and concentric with the tube, extending below the point of communication with said cup, a valve slidable upon said depending portion having a seat below said point of communication with the cup, a needle valve for also closing said communication adapted to dislodge any obstruction therein, and means for manually operating said valve from outside said casing.

7. In a lubricator, the combination with a casing having a central tubular portion and a surrounding cup portion, the lower end of said cup communicating with the central tube, of a chokeplug within said tube having a depending portion spaced from and concentric with the tube andextending below the point of communication with the cup, and a valve slidable upon said depend- 1ng portion for engaging a cooperating seat, said valve having a restricted passage therethrough for equalizing pressures on opposite sides thereof.

In testimony whereof I aflix my signature.

ELIJ AH MCCOY;

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. C. 

